listcourse.java

jsp例程

package business;

import hibernate.Course;
import dao.*;
import java.util.Iterator;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.JspWriter;

public class ListCourse {
	private CourseDAO couDao;

	public CourseDAO getCouDao() {
		return couDao;
	}

	public void setCouDao(CourseDAO couDao) {
		this.couDao = couDao;
	}
	public void list(HttpServletRequest request,HttpServletResponse response ,JspWriter out) throws Exception
	{
		String page=(String)request.getParameter("page");
		
		if(page!=null)
		{
		listpage(request,response,out,Integer.parseInt(page));	
		}
		else{
		listpage(request,response,out,1);	
		}
	}
	
	public void listpage(HttpServletRequest request,HttpServletResponse response, JspWriter out,int page) throws Exception
	{
		String name="",id="",prepare="",dep="",mark="";
		List list=couDao.getCourse();
		if(list==null)
		{
			out.print("尚无课程信息");
			return;
		}
		
		int total=list.size();
		int count=0;
		Iterator it=list.iterator();
		Course cour;
		while(count<(page-1)*5 && it.hasNext())
		{
			it.next();
			count++;
		}
		count=0;
		while(it.hasNext()  && count<5)
		{
			cour=(Course)it.next();
			id=cour.getId();
			name=cour.getName();
			if(cour.getMark()!=null)
				mark=cour.getMark().toString();
			
			else mark="0";
			prepare=cour.getPrepare();
			dep=cour.getDep();
			out.print("<tr><td>"+id+"</td><td>"+name+"</td><td>"+mark+"</td><td>"+prepare+"</td><td>"+dep+"</td>");
			out.print("<td><a href=deletecourse.do?Course_id="+cour.getId()+">删除</a></td>");
			out.print("<td><a href=updatecour.jsp?Course_id="+cour.getId()+">编辑</a></td></tr>");
			count++;
		}
		out.print("<tr><td colspan=5 align=center>");
		out.print("<table width=50% border=0 cellspacing=0><tr>");
		if((page-1)>0)
		{
			out.print("<td width=50% colspan='5'><a href=getcourse.jsp?page="+(page-1)+">上一页</a>  &nbsp;&nbsp;&nbsp;");
			
		}
		if((page-1)<(total/5))
		{
			out.print("<td width=50% colspan='5'><a href=getcourse.jsp?page="+(page-1)+">下一页</a></td>");
		}
	  
		
	}

}